From ebf4f39331cf8dec838a1593a0328b667d62b871 Mon Sep 17 00:00:00 2001
From: evlist <vdv@dyomedea.com>
Date: Mon, 7 Nov 2022 11:44:35 +0100
Subject: [PATCH] More fun with web workers...

---
 src/db/index.ts                       | 20 ++++++++++++++++++--
 src/workers/dispatcher-main.test.js   |  4 +---
 src/workers/dispatcher-main.ts        |  2 +-
 src/workers/dispatcher-worker.test.js |  5 ++++-
 src/workers/dispatcher-worker.ts      | 17 ++++++++++++++---
 5 files changed, 38 insertions(+), 10 deletions(-)

diff --git a/src/db/index.ts b/src/db/index.ts
index 87a2a6f..d243570 100644
--- a/src/db/index.ts
+++ b/src/db/index.ts
@@ -1,6 +1,10 @@
 import _ from 'lodash';
+import PouchDB from 'pouchdb';
+import PouchDBFind from 'pouchdb-find';
 import uri from '../lib/ids';
 
+PouchDB.plugin(PouchDBFind);
+
 const dbDefinitionId = uri('dbdef', {});
 
 const currentDbDefinition = {
@@ -9,7 +13,19 @@ const currentDbDefinition = {
   def: { version: '0.000001' },
 };
 
-export const initDb = async (db: any, setDbReady?: any) => {
+declare global {
+  var db: any;
+  var dbReady: boolean;
+}
+
+export const initDb = async (params: any) => {
+  if (globalThis.db === undefined) {
+    globalThis.db = new PouchDB('dyomedea', {
+      auto_compaction: true,
+      revs_limit: 10,
+    });
+  }
+  const db = globalThis.db;
   var previousDbDefinition = {
     _id: dbDefinitionId,
     type: dbDefinitionId,
@@ -81,7 +97,7 @@ export const initDb = async (db: any, setDbReady?: any) => {
     }
   }
 
-  if (setDbReady !== undefined) setDbReady(true);
+  globalThis.dbReady = true;
 
   /*   const indexes = await db.getIndexes();
   console.log(`indexes: ${JSON.stringify(indexes)}`);
diff --git a/src/workers/dispatcher-main.test.js b/src/workers/dispatcher-main.test.js
index 0b9504c..283d078 100644
--- a/src/workers/dispatcher-main.test.js
+++ b/src/workers/dispatcher-main.test.js
@@ -1,6 +1,4 @@
-import dispatch, { init, worker } from './dispatcher-main';
-
-var mockPostMessage = jest.fn();
+import dispatch, { init, worker } from './dispatcher-main'
 
 jest.mock('./get-worker', () => ({
   getWorker: () => ({
diff --git a/src/workers/dispatcher-main.ts b/src/workers/dispatcher-main.ts
index 57f9ca3..eccb8fd 100644
--- a/src/workers/dispatcher-main.ts
+++ b/src/workers/dispatcher-main.ts
@@ -11,7 +11,7 @@ export const init = () => {
 
   worker = getWorker();
 
-  console.log(`worker: ${worker}`)
+  console.log(`worker: ${worker}`);
 
   worker.port.onmessage = (event: any) => {
     const { id, payload } = event.data;
diff --git a/src/workers/dispatcher-worker.test.js b/src/workers/dispatcher-worker.test.js
index 8e35a5f..f9d1e8f 100644
--- a/src/workers/dispatcher-worker.test.js
+++ b/src/workers/dispatcher-worker.test.js
@@ -14,6 +14,9 @@ describe('The dispatcher-worker ', () => {
   });
   test('receives a ping and sends a pong', () => {
     port.onmessage({ data: { id: 5, payload: 'ping' } });
-    expect(port.postMessage).toBeCalledWith({ id: 5, payload: '"ping" pong' });
+    expect(port.postMessage).toBeCalledWith({
+      id: 5,
+      payload: 'unknownAction',
+    });
   });
 });
diff --git a/src/workers/dispatcher-worker.ts b/src/workers/dispatcher-worker.ts
index 4660867..4ff2eee 100644
--- a/src/workers/dispatcher-worker.ts
+++ b/src/workers/dispatcher-worker.ts
@@ -1,12 +1,23 @@
+import { initDb } from '../db';
+
 const self = globalThis as unknown as SharedWorkerGlobalScope;
 
+const actions = { initDb };
+
 self.onconnect = function (e) {
   var port = e.ports[0];
 
-  port.onmessage = function (e) {
-    console.log(`Worker received ${JSON.stringify(e)}`);
+  port.onmessage = async function (e) {
+    console.log(`Worker received ${JSON.stringify(e.data)}`);
     const { id, payload } = e.data;
-    port.postMessage({ id: id, payload: `${JSON.stringify(payload)} pong` });
+    console.log(`payload.action in actions: ${payload.action in actions}`);
+    var returnValue: any = 'unknownAction';
+    if (payload.action in actions) {
+      returnValue = await actions[<keyof typeof actions>payload.action](
+        payload.params
+      );
+    }
+    port.postMessage({ id: id, payload: returnValue });
   };
 };